Core: Document getRootObjects : Fix bug of objects linked not returned. #13780
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If a root object has a link pointing to it, then it is not returned by RootObjects.
![image](https://private-user-images.githubusercontent.com/19984177/327391028-a644df67-2693-4cf7-a651-e3d0c8782dd6.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.sl4YZB0pzglNmfHgTulXRJmm-N4ukwHz0mLn64St_7Q)
Having a look at the function in cpp it seems to be because its checking if the inList is empty to determine if its a root object.
https://forum.freecad.org/viewtopic.php?p=756837#p756837